Add how much stock you have for it. You can manually add inventory in the new item screen or through a Purchase Order if you have multiple items from the same consignor.

To see what you owe consignors

From the main menu, go to Reports > Grouped Sales Totals: Brand.

Set whatever daterange you'd like to report on. For example, many retailers do an end of month consignment report.

Click the Advanced arrow for the report and in the Tag field, enter consignment and click Search. The report displays the summarized totals for all your consignors. The Cost column for each is how much you owe them.

To view the individual consignment items sold by a consignor, click the eyeball icon next to their name to display a Line Report filtered for them.